Shadowing-Übung: How Tire Rolling Resistance Affects Cycling Speed ? - Englisch Sprechen Lernen mit Video
Lektion wird erstellt...
1
What is rolling resistance and why should you think about it on the bike?
2
Rolling resistance is, quite simply, the energy that is lost as a tyre rolls along a surface.
3
The energy is mostly lost because of the constant deformation of that tyre against the surface.
4
Now, whilst paying attention to rolling resistance is important, it's not actually the biggest resistance factor when it comes to cycling fast.
5
Air resistance rises in a squared ratio with increased speed.
6
At a speed of 20 kilometers an hour on a level ground, air resistance has already become the main resistance force.
7
And the faster you go, the more air resistance increases exponentially.
8
So before even thinking about rolling resistance, get aero.
9
Acceleration energy is also expended, for instance, the weight of the wheels is of great importance when this mass has to be brought up to rotation.
10
Then when riding uphill, the main resistance force to be overcome is the gradient resistance.
11
This is basically the additional resistance added by fighting gravity.
12
And in addition to these, there are other friction resistances in the chain, the bottom bracket, and other rotating parts.
13
Now, in a well-serviced bicycle, these represent a very minor part of the total resistance.
14
So, should you just ignore rolling resistance then?
15
Well, no. Because improving your rolling resistance may be the cheapest
16
and easiest upgrade you can make to your bike to go faster.
17
You can improve all the others by getting aero, by getting a good bike fit and spending the time getting used to it, by getting aerodynamic and light frame,
18
by getting some aerodynamic race wheels, and even by upgrading the bearings to maybe ceramic bearings.
19
But you can get big gains simply by upgrading your tires and improving your rolling resistance.
20
And of course, pumping those tires to the right pressure.
21
It's pretty simple.
22
A tire with a higher rolling resistance will require more power
23
to attain the same speed than a tire with a lower rolling resistance, will require less power.
24
So what factors affect the tyres rolling resistance?
25
Tyre pressure.
26
On a completely smooth surface the following applies.
27
The higher the inflation pressure the less the tyre deforms and thus the lower the rolling resistance.
28
However on an imperfect surface which we are always riding on lower inflation pressures cause the opposite, lower rolling resistance.
29
Imperfections in the road on a very hard tyre will cause bouncing and skipping and increased resistance, not to mention the toll that takes on the rider in terms of fatigue.
30
Whereas a tyre with low inflation pressure can adapt better to the rugged surface.
31
It sinks into the ground less and absorbs imperfections rather than pushing against them and bouncing off them.
32
And so with a softer tyre the whole rotational mass is held back much less on the uneven surface.
33
Tire width.
34
At the same tyre pressure on a smooth surface a wider tyre will have lower rolling resistance than a narrower tyre.
35
This is essentially because a wider tyre with the same pressure actually has an effect of higher pressure
36
because a wider tyre with a higher air volume will have a higher casing tension.
37
Basically the wider tyre will be harder because it needs more air to fill it and the contact patch, the bit of the tire touching the road, will be smaller and wider, decreasing the rolling resistance.
38
But again this only holds true on a smooth surface.
39
On an imperfect surface with the pressure corrected for the width to get the tire to the right hardness, the contact patch on the road for a wider tire will be shorter and wider than a narrow tire,
40
decreasing the rolling resistance.
41
Importantly the wider the tyre will have more versatility and the range of pressures you can actually use, allowing you to more easily correct for the roughness of the surface.
42
Tyre construction.
43
Obviously the tyre construction has an effect on rolling resistance.
44
By using less material, less material can and will be deformed.
45
And the more flexible the material is, such as the rubber compound, the less energy is lost through deformation.
46
Generally, smoother treads have a lower rolling resistance than rougher treads
47
and that is why almost all road
48
and triathlon racing tires have very smooth tread patterns
49
if any tread pattern at all interestingly actually in racing tires for the road the tread pattern
50
that is there is actually not there for grip
51
or water dispersion it's mostly there for aerodynamics
52
because the tread pattern actually trips the laminar flow as
53
that of that air that's hitting the tire to improve the aerodynamics So,
54
should you consult a website like BicycleRollingResistance.com where they list all the tested rolling resistance of all tyres
55
and simply choose the one from the top of the list?
56
Well, yes and no. Yes, the tires on the top of that list will be the fastest.
57
However, they're always compromises.
58
Some of them may sacrifice durability for that extra speed and be more prone to punctures.
59
Some of them may have a different compound that sacrifices comfort
60
and grip and road feel and some may simply not work well with your wheel and bike setup.
61
It's also worth pointing out that the difference between the top of
62
that list of racing tires and the middle of
63
that list of racing tires is about a two to three watt saving
64
which is an almost imperceptible difference for most mere mortals.
65
They will however have a significant difference in those racing tires over your standard training tires.
66
So the answer is that the best tire for you depends on many factors
67
but it is worth considering investing the $100 to $200 in a good pair of racing tyres.
68
It may just be the cheapest watts you buy this season.
69
One more thing before we go, you may be asking which is faster rolling resistance-wise, tubeless or clincher?
70
Well, the speed of a tyre actually depends on its construction and not whether it's set up clincher or tubeless.
71
So, a slow tubeless tyre will actually be slower than a fast clincher tyre.
72
However, generally speaking, setup does have better rolling resistance than a tube setup.
73
However, if you put a latex tube in a clincher, the rolling resistance is actually the same as tubeless.
74
I hope you've enjoyed this video.
75
Happy riding!
📺 Gleicher Kanal
✨ Empfohlenes Video
B267 Sätze
Can cycling reduce global warming?
Daily ConversationUniversity StudentsWorking Adults
B21
91 Sätze
How to RUN So FAST It Feels ILLEGAL
Daily ConversationWorking Adults
C1130
17 Sätze
How exercise benefits your body
Daily ConversationUniversity StudentsWorking Adults
B21
300 Sätze
Are Gears Gone For Good? + Hottest New eBike Tech! | EUROBIKE 2026
Daily ConversationWorking Adults
B21
263 Sätze
Your Belly Fat Isn’t Going Away Because of THIS One Mistake — Fix It Before You Train Harder
Daily ConversationWorking Adults
B12
5 Sätze
Why Should You Use A Foam Roller? #shorts
Daily ConversationUniversity StudentsWorking Adults
B21
15 Sätze
This Breathing Patter Will Change The Way You Swim 🏊♀️ #swimming #swim
Daily ConversationWorking Adults
B22
111 Sätze
Rolling a Reliant Robin | Top Gear | BBC
British AccentDaily ConversationUniversity StudentsWorking Adults
B22
291 Sätze
A Cheap Racing Wheel Changed My Entire Life
Business EnglishDaily ConversationUniversity Students
B222
13 Sätze
You can achieve anything you want
American AccentDaily ConversationWorking Adults
B23
41 Sätze
What your push-ups are actually missing (feat. Red Delta Project)
Daily ConversationWorking Adults
B12
108 Sätze
21 Lessons I Learned on My First Bike Tour - Cycling Tour Tips
Travel EnglishDaily ConversationUniversity Students
Wortschatz und Sprechhinweise zu dieser Lektion
Dieses Video enthält 75 Sätze und 1065 Wörter zum Nachsprechen. Der gesprochene Teil dauert 5:59. Der Sprecher spricht in natürlichem Tempo, etwa 178 Wörter pro Minute, ähnlich wie im Alltagsgespräch. Nur 76 % der Wörter gehören zu den 3.000 häufigsten im Englischen, der Wortschatz ist also anspruchsvoll.
Wichtiger Wortschatz in diesem Video
15 lernenswerte Wörter aus dem Video, mit Aussprache und Bedeutung:
| Wort | Aussprache | Bedeutung |
|---|---|---|
| tyre Substantiv | /taɪə(ɹ)/ | Reifen |
| tire Verb | /ˈtaɪ̯ɚ/ | ermüden |
| tread Verb | /tɹɛd/ | treten, festtreten |
| smooth Adjektiv | /smuːð/ | reibungslos, problemlos |
| upgrade Verb | /əpˈɡɹeɪd/ | verbessern |
| inflation Substantiv | /ɪnˈfleɪ.ʃən/ | Inflation, Geldentwertung |
| narrow Adjektiv | /ˈnæɹəʊ/ | eng, begrenzt |
| tube Substantiv | /tuːb/ | Tube |
| sacrifice Substantiv | /ˈsæk.ɹɪ.faɪs/ | Opfer |
| bearing Substantiv | /ˈbɛɹɪŋ/ | Lager |
| depend Verb | /dɪˈpɛnd/ | abhängen, ankommen |
| patch Substantiv | /pæt͡ʃ/ | Flicken, Lappen |
| compound Substantiv | /ˈkɑmpaʊnd/ | Mischung, Verbindung |
| decrease Verb | /dɪˈkɹiːs/ | abnehmen |
| grip Substantiv | /ˈɡɹɪp/ | Griff |
Phrasal Verbs, die du hören wirst
| Wort | Aussprache | Bedeutung |
|---|---|---|
| hold back Verb | sich zügeln, sich zurückhalten | |
| point out Verb | hinweisen | |
| set up Verb | /ˌsɛt ˈʌp/ | aufbauen, für den Einsatz vorbereiten |
Aussprache, auf die du achten solltest
- Die „th“-Laute: smooth /smuːð/, width /ˈwɪtθ/, triathlon /tɹaɪˈæθˌlɑn/
- Die Laute „sh“ und „zh“: inflation /ɪnˈfleɪ.ʃən/, essentially /ɪˈsɛnʃəli/, ratio /ˈɹeɪ.ʃoʊ/, tension /ˈtɛnʃən/, rotation /ɹoʊˈteɪʃən/
- Lange Wörter – auf die Betonung achten: essentially /ɪˈsɛnʃəli/, importantly /ɪmˈpɔɹ.tənt.li/, acceleration /əkˌsɛl.əˈɹeɪ.ʃən/, aerodynamic /ˌɛəɹəʊdaɪˈnæmɪk/, deformation /ˌdɛfəˈmeɪʃən/
So übst du mit diesem Video
- Höre dir das ganze Video einmal an, ohne zu sprechen, und notiere die Wörter, die du nicht kennst.
- Beginne mit 0,75-facher Geschwindigkeit, sprich Satz für Satz nach und wechsle zur normalen Geschwindigkeit, sobald es leichtfällt.
- Nimm dich auf und vergleiche mit dem Original; achte dabei auf Wörter wie tyre, tire, tread.
Grammatik in diesem Video
Die Strukturen, die der Sprecher am häufigsten verwendet, mit den genauen Worten aus dem Video:
| Struktur | Im Video |
|---|---|
| Passiv be + Partizip Perfekt – wichtig ist, was geschieht, nicht wer es tut | is lost · is also expended · be overcome |
| Present Perfect have/has + Partizip Perfekt – eine vergangene Handlung, die jetzt noch wichtig ist | has already become · you've enjoyed |
Was ist die Shadowing-Technik?
Shadowing ist eine wissenschaftlich fundierte Sprachlerntechnik, die ursprünglich für die professionelle Dolmetscherausbildung entwickelt und durch den Polyglotten Dr. Alexander Arguelles populär gemacht wurde. Die Methode ist einfach aber wirkungsvoll: Du hörst englisches Audio von Muttersprachlern und wiederholst es sofort laut — wie ein Schatten, der dem Sprecher mit nur 1–2 Sekunden Verzögerung folgt. Anders als passives Hören oder Grammatikübungen zwingt Shadowing dein Gehirn und deine Mundmuskulatur, gleichzeitig echte Sprachmuster zu verarbeiten und zu reproduzieren. Studien zeigen, dass es Aussprachegenauigkeit, Intonation, Rhythmus, verbundene Sprache, Hörverständnis und Sprechflüssigkeit signifikant verbessert — was es zu einer der effektivsten Methoden für die IELTS Speaking-Vorbereitung und reale englische Kommunikation macht.